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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (LH) causes female's egg to break (her period)
sow gestation
penis sizes vs delivering methods
Lutinizing Hormone in females
pelvis
2. Duct through penis that carries sperm and urine
polyestrous
Lutinizing Hormone in females
cow estrus
urethra
3. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
Avg. bull specs
1. more cost effective - 2. powdered milk is in excess production
organs used in spermatogenesis
butterfat
4. Urinary calculi.
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Lutinizing Hormone in males
polyestrous
urethra
5. 265-285 days
burdizzo
Dairy Cattle Gestation
effects of BST
Holstein Cow
6. Not under a timeline - cow can not be sold as steak
epididymis: definition - 3 parts - 4 functions
why does the cow need fat deposits during pregnancy?
Grading choice
Where livelihood is in agriculture
7. 1. brain function - 2. blood flow - 3. willing female
purpose of Breeding Soundness Exam (BSE) for males
prostate gland
what has to happen for males for copulation to occur
elastrator
8. Front feet and head first. (except for hogs and dogs)
things to check for in a breeding soundness exam (BSE)
normal presentation of the fetus
Hard
mare estrus
9. Allows extension of penis without fibro-elastic penis
penis proper
6-8 weeks
vagina
sigmoid flexure
10. Luteolysis happens because of the ____________ hormone
sertoli cells
Dairy Cattle Gestation
prostaglandin
humans: stress level vs sperm
11. Milk is 15% ________ and 85% __________.
Size of cow in relation to the amount of milk produced
rectal palpation (BSE)
retractor muscles
dry matter and water
12. Implies the amount of estrogen production
femininity of a heifer
prostate gland
Dairy calves are removed from cow at birth to...
Dairy Cattle Lactation (standard)
13. 283 days
growth lost from castration methods (knife & band)
cow gestation
1. more cost effective - 2. powdered milk is in excess production
butterfat
14. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
growth lost from castration methods (knife & band)
Mares
sperm cell
estrous
15. Look for infection - split - and rupture of the penis
1. more cost effective - 2. powdered milk is in excess production
semen evaluation (BSE)
penis and prepuce observation (BSE)
age and castration
16. Luteolysis happens because of the ____________ hormone
Reasons for gestation length being affected
Sperm growth rate
prostaglandin
elastrator
17. Why Dairy calves are fed powdered milk.
eminal vesicles
Size of cow in relation to the amount of milk produced
visual evaluation (BSE)
1. more cost effective - 2. powdered milk is in excess production
18. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
4 major reasons for culling dairy cows
colostrum
sigmoid flexure
Jersey Cow
19. Depository for semen during insemination. where urine leaves the body
Mares
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
vagina
dry-off time in dairy cattle
20. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
sow estrus cycle
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Culls bulls earlier (2 reasons)
Where livelihood is in agriculture
21. Provide nourishment for the developing sperm
eminal vesicles
sertoli cells
Where livelihood is in agriculture
uterus
22. Animals which have many estrous periods per year (ex: cow - sow)
Avg. bull specs
polyestrous
~1 month
burdizzo
23. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
sow estrus
van deferens
elastrator
prostaglandin
24. Days which have increasing daylight hours
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25. Way to know everything is alright with the breeding male
seasonally polyestrous
why does the cow need fat deposits during pregnancy?
purpose of Breeding Soundness Exam (BSE) for males
Lutinizing Hormone in females
26. 16-20 hours
dartos muscle
sow estrus
Lutinizing Hormone in females
cow estrus
27. Milk ~305 days - dry 60 days prior to calving
Where livelihood is in agriculture
ewe gestation
Dairy Cattle milking schedule
Bull's fibro-elastic penis
28. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
normal presentation of the fetus
eminal vesicles
butterfat
29. 30 hours after estrus begins
cow ovulation
stag
what has to happen for males for copulation to occur
Where livelihood is in agriculture
30. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
ewe estrus cycle
rectal palpation (BSE)
sow estrus cycle
age and castration
31. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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32. Important 'landmark' during palpation
cervix
testosterone
effects of estrogen
Follical Stimulating in males
33. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
cremaster muscle
elastrator
Culls bulls earlier (2 reasons)
~1 month
34. 2 month growth cycle. stored in the epididymis of the bull
Brown Swiss Cow
Sperm growth rate
6-8 weeks
cryptorchid
35. When are dairy cattle dehorned?
~1 month
Where livelihood is in agriculture
rectal palpation (BSE)
growth lost from castration methods (knife & band)
36. 16-20 hours
mastitis
vulva
cow estrus
prostaglandin
37. 147 days
ewe gestation
burdizzo
scrotum
hormones
38. (male) pushes the testes upward toward the body for warmth or protection
dartos muscle
cow ovulation
1. more cost effective - 2. powdered milk is in excess production
Size of cow in relation to the amount of milk produced
39. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
elastrator
sow estrus cycle
colostrum
what has to happen for males for copulation to occur
40. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
prostaglandin
mastitis
reason for seasonal breeding periods
41. Implies the amount of estrogen production
Hormones from both the fetus and the mom.
Parturition
femininity of a heifer
effects of BST
42. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
penis sizes vs delivering methods
Lutinizing Hormone in females
Follical Stimulating in males
age and castration
43. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
cow estrus
femininity of a heifer
cervix
44. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
van deferens
epididymis: definition - 3 parts - 4 functions
oviducts
prostaglandin
45. 2 month growth cycle. stored in the epididymis of the bull
Brown Swiss Cow
Sperm growth rate
Blood
uterus
46. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
#1 cost in production
Parturition
Dairy Cattle milking schedule
uterus
47. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
ewe estrus
feeding a high producing dairy cow
reason for seasonal breeding periods
Dairy Cattle Gestation
48. 336 days
Hormones from both the fetus and the mom.
Holstein Cow
Parturition
mare gestation
49. Days which have decreasing daylight hours
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50. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Mares
Lutinizing Hormone in males
Where livelihood is in agriculture
ewe estrus cycle